The incident happened when a box truck approached the primary inspection area of the Border Patrol checkpoint on U.S. 59. An immigration inspection of the truck's driver determined he was a U.S. citizen.

While at the primary inspection area, a Border Patrol K-9 alerted to the presence of possible concealed contraband in the vehicle. Agents referred the driver to secondary inspection, at which point the driver accelerated and drove away from the checkpoint.

Agents pursued the vehicle for approximately two miles before the driver pulled over. The driver was arrested, and a search of the vehicle revealed 24 individuals in the cargo area. Despite the temperature inside the cargo area being over 100 degrees, none of the undocumented immigrants required medical attention.